# Score level judgment.py
X = eval(input("请输入分数："))
if 90 <= X < 100:
    s = "A"
elif 80 <= X < 90:
    s = "B"
elif 60 <= X < 80:
    s = "C"
elif X < 60:
    s = "D"
else:
    s = "输入错误"
print("你的分数级别为：{}".format(s))
